Tractor wheel and scraper



F. P. ARNOLD. TRACTOR WHEEL AND SCRAPER;

Patented Feb. 14, 1922.

2 SHEETS SHEET 1- INVENTOR MFA/ma ATTORNEYS F. P. ARNOLD.

TRACTOR WHEEL AND SCRAPER.

APPLICATION FILED OCT. 8. 1920.

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UNITED STATE FRANK P. ARNOLD, 'OF'WATKINS, MINNESOTA.

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Specification of Letters Tatent. Patent d F b 14 1922 Application filed October 8, 1920. Serial No. 415,643.

ticulars and whereby to possess important advantages and characteristics,ai:nong which are the following. The wheel presents a duplex tread with an annular clearance space between the individual treads. novel scraper is arranged to coact with the duplex tread and yield to the pressure of a' stone or other hard substance if wedged in the wheel and turning therewith, and this regardless of thedirection of turning; the scraper and the form. ofthe treads make for freeing the wheel of dust anddirt and minimizing the accumulation thereof. A novel arrangement offlugs on the wheel at the treads results in eiiective traction while minimizing the packing of the ground, there being a main annular series of lugs on each tread and auxiliary lugs radially inward from the first lugs and functioning to engage around the ground should the wheel tend to sink to an abnormal extent as in sandy or wet soil. The distinctive features of my improved wheel will clearly appear from, the specific description following:

' wheel andfscraper embodying m'y in'ventini.

Reference is to be had to the accompany- .ing drawingsiormi-ng a partof this specification, it being understood that the draw ings are merely illustrative of a practical example of the invent on. I g V Figure .1 is aside elevation oi a tractor Fig. .2 is aplan view of scraper and seetional plan of a tpzauenea'f the wheel-as indicated b'ythe line .2--2, Fig. 1.

Fig. 3 is ,a an enlarged scale as indicated by the line 33 of Fig. 1. p

- Fig. 4.- is a .detail in vertical section on the line 4.-'4-o Fig.3,

Fig. 5 is a diagrammatic plan viewof the duplex wheel tread, the view being given to better show the-arrangement of the peripheral lugs. d

In carrying out my invention m practice detail in horizontal seamen on the wheel is formed with a suitable hub'10 adapted to be mounted on an axle 11 in any approved manner. -Tw0 series of spokes 12,

or equivalent means, are provided on which runs are formed as follows: series of blocks 13 are secured to or formed upon each series of spokes and are made hollow to obtain the necessary strength with lightness.

. On the blocks 13 tread elements are pro- An annular vided, the tread elements of the respective blocks being connected by additional tread elements. In the illustrated example trans verse lugs 14 and peripherallyarranged lugs 15 alternate in each series. The transverse lugs 14 are formed upon base plates-16 which are suitably securedto the peripheral faces of theblocks 13, as by bolts 17 passing through flanges 13 on said blocks and passin through the base plates 16. The bolts 1 pass also through end flangesAS on the peripherally arranged lugs 15.

The blocks 13 of the respective treads are spaced apart to accommodate a scraper hereinafter described. transverse lugs of one tread are in staggered relation to those of the other tread which will be clear from Figs. 1 and 5, and the peripheral lugs 15 of the respective treads are also in staggered relation. In addition to the bolt 17 any other fastening means may be employed for the base plate 16,;as for example additional bolts 19, F ig. 2. The described lug arrangement is designed to present a sufiiciently broad ground "contact while impacting the ground to approximately onehalf the surface.

In addition to the peripheral lugs 14: and 15 I associate with each tread and radially inwardi'rom the periphery, auxiliary lugs 20 which are shown as in theform of angle irons,- the radiallvdisposed flanges of which are secured by bolts 21,.whi1e theother flanges are disposedlaterallyoutward, at a side of each block :13. The bolts 21 are adapted to be engaged by any one of a radial se" or backof a block 13, oron both 'theffront and back, On'the lateral flanges of the lugs 20 or at that surface facing radially inward .I may, as shown, secure filler blocks 23 presenting a sloping surface toward the axis of the wheel for shedding dust and dirt, there The blocks 13 and the being registering blocks 25 secured to the adjacent sloping surfaces of the blocks 13; Bolts 24, 26, or equivalent fastening means, secure the tiller blocks 23, 25.

In connection with the described wheel I employ a scraper adapted to project be tween the individualtreads; the scraper is yieldingly mounted and articulated so that it will yield to undue pressure in either direction of rotation oi? the wheel. In the illustrated form the scraper 27 ispivotally secured between its ends by a bolt 28 in the forked end of a shank 29 which shank is itself pivotally secured by a bolt 30 to a supporting plate 31 which is secured to the foot 32 of the hanger bracket'32 onany convenient part of the tractor, a portion of which is conventionally shown. The scraper 27 is formed beyond the'pivot bolt 28 with a downwardly disposed hook 34 which engages over a second bolt 35 passing through the forked end of the shank 29.

between the treads of the wheel and.thelat-,

ter be turned in the direction of the arrow in Fig. 1, the scraper 27 may yield downwardly tothe pressure of the stone and prevent the scraper from being broken, the hook end 34: i j I v run, the 1nd1v1dual IlIIl portions be ng sepadisengaging itself from the bolt 35. On the other hand should the wheel be turning in the reverse direction of the arrow,;a wedged stone acting against the scraper 27 at the under side will cause the shank 29 to rock on its pivot bolt 30 against the tension of the spring 36. The scraper entering between the duplex treads will prevent theclogging of the space between the treads. A rigid stop 31 on scraper support 31 limits themovement of shank 29 by engaging depending 7 member 29".

Reverting to the built-up rim portion composed of blocks 13 and lugs 14, 15, with the lug bases 16, 18; the arrangement is designed to minimize the picking up or accumulation of dust and dirt. It is to be noted that the blocks 13 present a comparatively large dimension radially of the wheel so that they I will not in ordinary soil sink to their back surface. 'Moreover, it will be noted that said blocks adjacent to their backs or inner surfaces are bevelled at all four sides of the block to afford a minimum lodgment for dust and dirt.

As anadditional means for preventing an accumulation of dust or dirt on theibuiltup rim portion of the wheel, the periph- Yerallyranging lugs15 are formed with pevent cloggin ripherally ranging members 15 at the backs thereof between the bases 16 of adjacent transverse lugs 14, said members l5 presenting side surfaces convergent toward the axis of the wheel, to thereby present inclines for readily shedding the dust as the wheel revolves,- particularly should the lugs 15, sink to their full depth in the soil. The construction oftheriin also will cause less dust to rise from the road than the solid rim wheels even those having a narrow. rim andtread. v The bases 16 of the lugs it constitute facings for theblocks 13, so that said blocks constitute lug elements the facing of which is formedby the said bases, In the case of the lug 20 if they are adjusted so thattheir approximately radial flanges are about in alinementwith the bases" 16-, they" will initially constitute a lug surface jointly with said bases 16, in the contacting ofthe soil,

irrespective of the auxiliary'action of the laterally disposed flanges of said lugs20. The 'lateral surfacespresented by the'lug surfaces are intended to function when the road is soft or in a plowed field.

I would state in conclusion that while the illustrated example constitutes a practical embodiment ofmy invention, I do not limit myself strictly to the mechanical details fined in the appended claims.

Iclaimz IL A tractor wheel presenting a duplex rated to afford ,clearancefor dirt and precircumferential lugs on each rim portion, and additional lugs radially in ward from the first inentionedlugsl v 2. A tractor wheel presenting a duplex rim, the individual rim portions being separated to aiford clearance for dirt and prevent clogging, peripheral lugs on each rim porherein illustrated, since manifestly the same can be considerably "varied without departnm from the spirit of the invention as de tion, and additional lugs on the wheel radially inward from the first mentioned lugs and radially adjustable on the wheel.

3. A tractor wheel including'rirn blocks,

lugs supported on'said blocksat the periphcry of the wheel, and lugs alternating with the first mentioned lugs and approximately at right angles thereto, said alternatinglugs being secured at their ends to said blocks. t. A tractor wheelincluding duplex rim portions, the individual rim portions supported on one hub, peripheral lugs on each rimfportion, and additional lugs radially inward from the first lugs and disposed in a plane laterally thereof.

5. A tractor wheel including duplex rim portions, the individual rim portions being separated, peripheral lugs on each rim portion, and additional lugs radiall inward from the first lugs, said additional ugs being disposed transversely on each rim portion and in a plane laterally of the first-mentioned lugs.

6. A tractor wheel including duplex rim portions, the individual rim portions being separated, peripheral lugs on each rim portion, and additional lugs radially inward from the first lugs, together with filler blocks secured to said auxiliary lugs and presenting a sloping surface toward the axis of the wheel.

7. A tractor wheel including a rim portion comprising peripheral lugs and separate supporting means radially inward from said lugs and supporting the same, there being clear spaces between said separate supporting means, said spaced means constituting a second annular series of lugs radially inward from the peripheral lugs and projecting from the peripheral surfaces of the said supporting means.

FRANK P. ARNOLD. 

